Governor cut-off-valve gear



' (No Model.)

I. W. BRAGG.

GOVERNOR GUT-OPP VAVLB GEAR.

No. 277,983. Patented May 22,1883.

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ISAAC w. BRAee, oF Kronen, MISSOURI.

GOVERNOR CUT-O'FF-VAL'VE GEAR.

SPECIFICATION forming- Ipart of Letters Patent No. 277,983, dated May 22, 1883,

Application filed August 11, 1882. (No model.) l

T o all whom 'it may concern Be it known that I, ISAAC W. BRAGG, ot' Kidder, in the county of Caldwell and State ot' Missouri, haye invented a certain new and useful Improvement in Governor Cnt Oli'- ValveGears, ot which the following is a i'ull, clear, and exact description', reference being had to the accompanying drawings, forming part ot' this specification, and in which- Figure 1 is a side elevation, showing the connection between the governor and the valves it operates. Fig. 2 is a transverse section taken on line 2 2, Fig. l. Fig. 3 is a transverse section taken on line 3 3, Fig. 1; and Fig. 4 is asimilar view taken on line 4 4, Fig. l. Fig. 5 is a vertical section on line 5 5, Fig. 1; and Fig. 6 is ahorizontal section on line 6 6, Fig; 45. Fig. 7 is a vertical section through the working parts, showiug'them in one position; and Fig. Sis a similar view, showing the parts in another position; and Fig. 9 is a modification.

Figs. 2, 3, 4, 5,6, 7, S, and 9 are on an enlarged scale from Fig. 1.

My invention relates to a clutch device which automatically regulates the position of the valves as the governor-balls rise and fall; and my invention consists in a stand having two branches, in each of which works a hollow shaft or sleeve provided with a means ot' clutching or engaging the driving-shaft of the governor and operating upon the valves to quicken or lengthen the cut-oit', as the case be.

In the accom panyin g drawings, A represents a valve-stein, having ou it two valves, B B, with which it has right-and-left screw-connection, and I have shown them applied to a common cylinder.

C is a rocker-arm of common' construction, with which the valve-stem is connected in Such a manner that while it moves backward and forward with the arm it is perfectly free to turn on'its` axis. I have shown it connected by means of a bolt, D, with an open head, E, through which the stem passes. The bolt is secured to the arm by a common nut. The end of the valve-stem is square, and it fits and slides freely within a sleeve, F,that turns in the governor-stand G, and has secured to its other end ammiter-wheel, H. The governorstand has two branches or arms, in the ends ot which are cutrightandleftscrews,respectively. In these arms work screw-threaded sleeves I I, the thread of each corresponding with that of its arm.` The outer ends ot' these sleeves have outturncd iianges, which are provided with projections or pins K L, respectively. Within these sleeves are hollow shafts M N, which carry, respectively, on their inner ends ruiter-wheels M N', which have engagement with the wheel lI on the sleeve F. There is a feather-and-groove connection between these shafts M and the sleeves I I', so that they are compelled to turn together, while the latter can slide freely endwise over the former.

\Vithin the hollow shafts M N is the sleeve 0, to which the upper ends ot'the governorballs I) I? are pivoted by their arms Q Q, in thc ordinary manner, and within the sleeve O is a rod or shal't, It, to which the governor-arms are connected by links S S and a transverse bar, T, which passes through the rod It and works in vertical slots in the governor-sleeve. Power is applied to the governor-sleevein any ordinary way, as at U.

V and W are hars or rods, which pass transversely through the inner rod and move vertically therewith as the balls rise and fall with the diterent rates ot' speed. They work, respectively, in slots V W in the sleeve O.

The operation is as follows: The balls, flying apart h v a high rate ot'v speed, raise the inner bar and bring the lower baror-k'ey, V, into engagement with the lower sleeve, I, the bar engaging the pins K, as shown in Fig. S, turning it (the sleeve) tothe right and the valvestem to the left, thereby lengthening the valve and making the cut-oft' earlier. Should .the balls fall, the reverse will take placethat is,

the inner rod falling will bring the bar Tinto engagement with the sleeve L, turning it to the left and the valve-stem to the right, there bysliortening the valve. It will thus be seen that when either Sleeve K IJ is turned it screws into the stand and withdraws itself from engagement with its bar, and, both screws being ofthe same pitch, the clutch-plates are always the same distance apart, for as one is screwed in the other is screwed ont.

I do not wish to confine myself to the exact form of clutch shown and described, for it may be varied.

In Fig. 9 is shown another form of connection between the governor and valvestem,

wherein the Sleeves I I are dispensed with.

loo

The hollow shafts M N screw in the ends of the stand and have tlanges on their outer ends, which receive the pins K L, their inner ends being turned down, forming reduced portions, which have endwise movement,through the initer-wheels M. N', but which are. prevented from turning` therein by a feather-and-groove connect-ion therewith.

`I claim as my inventionl. 'lhe combination, with a governor and a valve-stein. with suitable gearing connecting the saine, of clutches having screw-connection with the governor-stand and l'orlningan automatic connection between the governor and stein, so that they will withdraw themselves from contact willi the driver as soon ns the length ot' the valve is adjusted to the position of the'governor, as set forth.

2. The combination ot' stem A'with valves stand Gr, with two branches, sleeve F, in which the valve-stem works, and on whichis a wheel, H, hollow shafts M and N, ywith wheels MN,engagingthewheelH,g0vernorsleeve(), passing through the shafts M N and carrying the halls I), rod R within the governor-sleeve and connected to the halls by links S and cross-bar T, and hars V and W, secured to the inner rod, 1t, and working in vertical slots in the governor ,sleeve, the whole being constructed,substantially as shown and described,

with a means for a suitable clutch-connection between the hollow shafts M and N and the bars V and W, so that as the balls rise and fall they act automatically upon the valves to increase or diminish their cut, as set forth.

3. The combination of stem A with valves B, stand Gr, with two branches, sleeve F, in which the valve-stein works, and on which is a miterwheel, H, sleeves I and I', having, respectively right and left screw connection in the arms of the stand, and having outturned flanges with clutch-pins KL, hollonT shafts M and N, having groove-and-feather connection with the sleeves I and I', respectively, and having miterwheels M N', engaging with wheel H, governorsleeve O, passing through the shafts M and N and carryingthe governor-balls l), rod R,locat ed within the governor-sleevc and connected to the halls by links S and cross-har T and carrying hars V and W, working in vertical slots in the governor-sleeve as the har is raised and lowered by the balls, and arranged to engage alternately the pins K and L, to automatically lengthen and shorten the valves as the balls rise and l'all, as set forth.

ISAAC W. BRAGG.

Witnesses: l

A. R. SPRAGUE, J. J'. BARNARD. 

